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90 lines
2.2 KiB
90 lines
2.2 KiB
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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namespace android {
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#pragma clang diagnostic push
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#pragma clang diagnostic error "-Wpadded"
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enum : uint32_t {
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/**
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* follows is RpcWireTransaction, if flags != oneway, reply w/ RPC_COMMAND_REPLY expected
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*/
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RPC_COMMAND_TRANSACT = 0,
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/**
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* follows is RpcWireReply
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*/
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RPC_COMMAND_REPLY,
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/**
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* follows is RpcWireAddress
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*
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* note - this in the protocol directly instead of as a 'special
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* transaction' in order to keep it as lightweight as possible (we don't
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* want to create a 'Parcel' object for every decref)
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*/
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RPC_COMMAND_DEC_STRONG,
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};
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/**
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* These commands are used when the address in an RpcWireTransaction is zero'd
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* out (no address). This allows the transact/reply flow to be used for
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* additional server commands, without making the protocol for
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* transactions/replies more complicated.
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*/
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enum : uint32_t {
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RPC_SPECIAL_TRANSACT_GET_ROOT = 0,
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RPC_SPECIAL_TRANSACT_GET_MAX_THREADS = 1,
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RPC_SPECIAL_TRANSACT_GET_SESSION_ID = 2,
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};
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constexpr int32_t RPC_SESSION_ID_NEW = -1;
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// serialization is like:
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// |RpcWireHeader|struct desginated by 'command'| (over and over again)
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struct RpcWireHeader {
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uint32_t command; // RPC_COMMAND_*
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uint32_t bodySize;
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uint32_t reserved[2];
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};
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struct RpcWireAddress {
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uint8_t address[32];
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};
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struct RpcWireTransaction {
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RpcWireAddress address;
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uint32_t code;
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uint32_t flags;
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uint64_t asyncNumber;
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uint32_t reserved[4];
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uint8_t data[0];
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};
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struct RpcWireReply {
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int32_t status; // transact return
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uint8_t data[0];
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};
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#pragma clang diagnostic pop
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} // namespace android
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